CN101849096A - Fuel overflow valve for a fuel injection system, and fuel injection system having a fuel overflow valve - Google Patents
Fuel overflow valve for a fuel injection system, and fuel injection system having a fuel overflow valve Download PDFInfo
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- CN101849096A CN101849096A CN200880114809A CN200880114809A CN101849096A CN 101849096 A CN101849096 A CN 101849096A CN 200880114809 A CN200880114809 A CN 200880114809A CN 200880114809 A CN200880114809 A CN 200880114809A CN 101849096 A CN101849096 A CN 101849096A
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- valve
- fuel
- valve element
- supporting member
- pressure
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- 239000000446 fuel Substances 0.000 title claims abstract description 123
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7847—With leak passage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/785—With retarder or dashpot
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a fuel overflow valve for a fuel injection system, particularly for limiting the pressure in a low-pressure region of the fuel injection system. The fuel overflow valve has a valve housing (38), in which a valve member (42) is disposed in a stroke-moving manner, the stroke movement of said valve member controlling a connection (43) of an inlet to the valve housing (38) to a release region. The valve member (42) is loaded by a valve spring (48) in the direction of a locking position in which the connection (43) of the inlet to the release region is interrupted, and is loaded by the pressure present in the inlet in the opening direction. The valve member (42) may carry out a further stroke in the locking direction beyond the locking position thereof, wherein the valve spring (48) does not act upon the valve member (42). Due to the increased stroke of the valve member (42), an improved balance of pressure and volume fluctuations is enabled in the low pressure region and the stroke of the valve spring (48), and thus the stress thereof, may be kept low.
Description
Technical field
The present invention relates to fuel relief valve that is used for fuel injection system and fuel injection system with fuel relief valve according to the type of claim 1 or claim 9.
Background technique
Such fuel relief valve and such fuel injection system are open by DE 100 57 244 A1.This fuel relief valve is used for the pressure of the area of low pressure of fuel limitation injection apparatus.This fuel relief valve has a valve chest, but the to-and-fro motion of a valve element be arranged in this valve chest.In the to-and-fro motion of this valve element, control from the inlet of area of low pressure and being connected of the outlet of leading to unloading area by this valve element.This valve element is loaded on the direction of closed position by valve spring, in this closed position inlet with export between be connected interruption, and this valve element is loaded opening on the direction by the pressure that is present in the inlet.If the pressure in the area of low pressure surpasses the pressure of opening by the valve spring decision, then this fuel relief valve is opened and fuel can flow out to the unloading area by outlet from the inlet from the area of low pressure, for example flows out in the reflow pipe that leads to fuel storage container.This fuel injection system has a high-pressure service pump, by this high-pressure service pump the fuel under the high pressure at least indirectly, is for example passed through a storage and carries at least one sparger.By a transfer pump fuel is flowed to high-pressure service pump.This high-pressure service pump has at least one pump piston, and described pump piston is arranged in the drive area drive unit by one and drives reciprocating.Is extending between transfer pump and the high-pressure service pump and low pressure that produces by transfer pump of existence in this area of low pressure the area of low pressure of this fuel injection system.This area of low pressure is connected with the drive area of high-pressure service pump.Because the to-and-fro motion of described at least one pump piston, the volume of drive area changes, because in the stroke of the outside sensing of pump piston, it is big that the volume of this drive area becomes, and in the stroke of the inside sensing of this pump piston, the volume of this drive area diminishes.In the drive area, produce pressure surge thus.Especially in the high-pressure service pump that only has a pump piston, produce stronger pressure surge.Therefore, also produce pressure surge in whole area of low pressure, this pressure surge may have adverse effect to the function of fuel injection system.In order to compensate described pressure surge, the valve element of this fuel relief valve must can be carried out big stroke, and this correspondingly also requires valve spring to have big stroke.This causes again: be the big installing space of valve spring needs, and this valve spring loaded consumingly, therefore may rupture.
Summary of the invention
By comparison, the fuel relief valve with feature as claimed in claim 1 according to the present invention has the following advantages: the valve element can irrespectively be carried out bigger stroke with valve spring, can realize the better compensation to pressure surge thus.For valve spring is moved in its closed position, this valve spring only needs to carry out limited stroke, so the load of the structure space of this fuel relief valve and valve spring can keep very little.Obtain corresponding advantages for fuel injection system according to claim 9, the function of this fuel injection system by the pressure surge in the area of low pressure reduce improve.
Provide favourable structural scheme and expansion structure in the dependent claims according to fuel relief valve of the present invention.Structure according to claim 2 can be realized the valve element stroke bigger than valve spring stroke with plain mode.By structure according to claim 3, realize buffering to the stroke motion of supporting member, therefore realize the buffering valve element and stroke motion valve spring is reduced the load of valve spring thus.Can realize equally buffering to the stroke motion of supporting member realizing buffering thus according to the structure of claim 5 to the stroke motion of valve element and valve spring.Can under the situation that does not change valve chest, realize the two-stage type structure of fuel relief valve according to the structure of claim 7 or 8.
Description of drawings
Shown in the drawings and the elaboration at length in the following description book of two embodiments of the present invention.Shown in it:
Fig. 1 illustrates a fuel injection system with the schematic representation of simplifying;
Fig. 2 illustrates the fuel relief valve that is arranged in closed condition according to first embodiment's fuel injection system with longitudinal section, and this fuel relief valve has a valve element that is arranged in primary importance;
Fig. 3 illustrates the fuel relief valve that is arranged in closed condition, and this fuel relief valve has the valve element that is arranged in the second place;
Fig. 4 illustrates the fuel relief valve that is arranged in open mode;
Fig. 5 illustrates the fuel relief valve that is arranged in closed condition according to second embodiment.
Embodiment
A kind of fuel injection system that is used for internal-combustion engine shown in Figure 1.This fuel injection system has a transfer pump 10, and this transfer pump sucks fuel and fuel is transported to the suction side of high-pressure service pump 14 from fuel storage container 12.Fuel is transferred the discharge pressure that pump 10 is compressed to for example about 4 to 6 crust.This transfer pump 10 can electricity ground or mechanically driving.Between the suction side of transfer pump 10 and high-pressure service pump 14, a fuel metering device 16 can be set, can regulate changeably by high-pressure service pump 14 fuel quantities that suck and that under high pressure carry by this fuel metering device.This fuel metering device 16 can be a Proportional valve, and this Proportional valve can be regulated the through flow cross sections of different sizes, or beat valve and mechanically or electricly pass through electric control device 17 and control.
This high-pressure service pump 14 has housing 18, and a live axle that is driven in rotation 20 is arranged in the inner space 19 in this housing.This inner space 19 of housing 18 and the drive area of live axle 20 formation high-pressure service pumps 14.This live axle 20 has at least one cam 22 or eccentric wheel, and wherein, described cam 22 also can be configured to multiple mounted cam (Mehrfachnocken).This high-pressure service pump has at least one or a plurality of pump element 24, described pump element respectively has a pump piston 26, and the cam 22 of described pump piston by live axle 20 is actuated on the direction about the approximate radial at least of the spin axis of live axle 20 reciprocating indirectly.This pump piston 26 leads sealedly and defines pump work space 30 by its side that deviates from live axle 20 in cylinder-bore 28.This pump work space 30 has and being connected from the fuel inlet of transfer pump 10 by an inlet valve of opening in pump work space 30 32.This pump work space 30 has and being connected of exporting by an outlet valve 34 of opening from pump work space 30 in addition, and this outlet for example is connected with high pressure accumulator 110.Sparger 120 on one or the preferred a plurality of cylinder that is arranged on internal-combustion engine is connected with this fuel storage device 110, injects fuel into by described sparger in the cylinder of internal-combustion engine.This high pressure accumulator 110 also can save, and wherein, this high-pressure service pump 14 is connected by hydraulic pipe line with sparger 120 then.Described pump piston 26 moves in its suction stroke in the inner space 19 and at this and by the inlet valve of opening 32 fuel is drawn into the pump work space 30 from the inlet from transfer pump 10.Described pump piston 26 in its delivery stroke internally space 19 move out and the fuel under the high pressure be transported to the high pressure accumulator 110 via the outlet valve of opening 34 or carry to sparger 120 from pump work space 30.
Zone between transfer pump 10 and the fuel metering device 16 constitutes an area of low pressure, has the pressure that is produced by transfer pump 10 in this area of low pressure.At this, carry identical fuel quantity enduringly by this transfer pump 10, but suck variable fuel quantity by the adjusting of high-pressure service pump 14 based on fuel measuring apparatuss 16.Therefore, a fuel relief valve 36 is set, by the pressure in this fuel relief valve restriction area of low pressure.When the pressure in the area of low pressure surpass the fuel relief valve open pressure the time, this fuel relief valve 36 is opened, and will be discharged in the unloading area by transfer pump 10 fuel quantity controls that carry, that still do not sucked by high-pressure service pump 14 by this fuel relief valve 36 of opening, this unloading area for example is the reflow pipe 11 that leads to fuel storage container 12.
Below at length set forth fuel relief valve 36 by Fig. 2 to 4 according to first embodiment.This fuel relief valve 36 has a tubular valve chest 38, and this valve chest comprises that one has than the tubular section 39 of minor diameter and one and has larger-diameter tubular section 40.In the section 39 of valve chest 38, the valve element 42 of piston shape movably, guiding in vertical hole 41 hermetically.Be provided with at least one opening 43 in the section 39 of valve chest 38, this opening 43 makes vertical hole 41 be connected with the overcoat of section 39.These opening 43 preferable configuration are the hole, wherein, for example hole 43 of two mutual diametrically contrapositions are set.Vertically hole 41 can be connected by the reflow pipe that opening 43 with unloading area, for example leads in the fuel storage container 12.Be present in the also effect in vertical hole 41 of valve chest 38 of the open end of pressure by this vertical hole in this area of low pressure, act on thus on the end face of valve element 42.Therefore, this open end formation in vertical hole 41 enters the inlet the fuel relief valve 36 from the area of low pressure.If valve element 42 covers these openings 43, then this inlet is cut off, i.e. area of low pressure and unloading area disconnection, if this valve element 42 discharges this opening 43 at least in part, then this inlet, be that the area of low pressure is connected with unloading area.Therefore, this valve element 42 constitutes a guiding valve with opening 43.Open end place in this vertical hole 41 can be provided with a sieves 44 on valve chest 38, stop the contaminate particulate from the area of low pressure can enter into vertical hole 41 by this sieves.This sieves 44 can be fixed on by the fixed element 45 of an annular on the valve chest 38, and wherein, this fixed element can for example be connected with valve chest 38 by a crimping.
Valve spring 48 is arranged in vertical hole 46 of section 40 of this valve chest 38, and extend coaxially with vertically hole 41 is approximate at least in this vertical hole 46, yet has the diameter bigger than this vertical hole 41, and this valve spring acts on the valve element 42 by supporting member 50.This supporting member 50 is configured to jar shape, and wherein, the open side that valve element 42 and this supporting member are pointed in the bottom 52 of this supporting member deviates from this valve element 42.This supporting member 50 can be in vertical hole 46 guiding movably, and the valve spring 48 that is configured to helical compression spring is inserted into this vertical hole 46 from the open side in this vertical hole, this valve spring abuts on the bottom 52.The end that deviates from valve element 42 in vertical hole 46 of this valve chest 38 is by inserting member 54 sealings, and this inserting member 54 also is used as the support of valve spring 48.This inserting member 54 can be configured to jar shape as supporting member 50, wherein, the open end of this inserting member points to valve element 42, and this valve spring 48 is inserted in this inserting member 54 and is supported on the bottom of this inserting member.This inserting member 54 is fixed in vertical hole 46, for example is expressed in this vertical hole.This supporting member 50 and/or this inserting member 54 can be configured to sheet forming spare.
Supporting member 50 is not connected with valve element 42, but only the work by valve spring 48 abuts on the valve element 42 in order to the bottom 52 of this supporting member 50.This supporting member 50 can be carried out a range towards valve element 42, and this range limits by supporting member 50 reclining on annular shoulder 56, and this annular shoulder is configured in from vertical hole 46 on the transition part in the littler vertical hole 41 of diameter.In the bottom 52 of supporting member 50, exist at least one to have the opening 58 of big cross section.In the fringe region near the transition part of the peripheral surface of itself and supporting member 50 of this bottom 52, be provided with at least one opening with little cross section 60.This vertical hole 46 can be connected with unloading area by at least one opening 62 of overcoat that leads to the section 40 of this valve chest 38, and this unloading area can for example be the reflow pipe that leads to fuel storage container 12.If this supporting member 50 abuts on the annular shoulder 56, then this supporting member does not cover this opening 62, thereby vertically hole 46 is connected with unloading area.If this supporting member 50 abuts in the annular shoulder 56s from it and moves in vertical hole 46, then this opening 62 is little by little covered by this supporting member, therefore this cross section diminishes, where necessary by complete closed, make vertical hole 46 only be connected with unloading area by a through flow cross section little, throttling or with this unloading area disconnection.
Below at length set forth the function of fuel relief valve 36.The position of annular shoulder 56 of stroke that is used to limit supporting member 50 in the length of this valve element 42 and the valve chest 38 is harmonious mutually in this wise, make when supporting member 50 abuts on the annular shoulder 56, this valve element 42 just in time covers opening 43, so the area of low pressure was cut off with being connected of unloading area.Valve element 42 in this position shown in Figure 2.From this position, valve element 42 still can continue the direction motion towards the open end in vertical hole 41, and wherein, this valve element 42 no longer abuts on the supporting member 50, thereby this valve spring 48 no longer acts on the valve element 42.Therefore, this valve element 42 can freely move in vertical hole 41 according to the pressure difference between the pressure in the pressure in the areas of low pressure that act on an one end face and the cylinder-bore 46 that acts on its another end face.By this valve spring 48 valve element 42 is moved on the closing direction of valve element, and this valve element 42 can irrespectively exceed other stroke of closed position execution of this valve element with valve spring 48, this other stroke can be for example limits by sieves 44 or fixed element 45, so that stop valve element 42 to move out from vertical hole 41.Figure 3 illustrates the valve element 42 that is arranged in this end position.
If be present in the underpressure in the area of low pressure so that the power that valve element 42 overcomes valve spring 48 moves so far in vertical hole 41, make this opening 43 be opened then area of low pressure and unloading area disconnection by 42 controls of valve element.If be present in the pressure of opening that pressure in the area of low pressure reaches fuel relief valve 36, then this valve element 42 power of overcoming this valve spring 48 is vertically moving in the hole 41, thereby open this opening 43 and the area of low pressure is connected with unloading area by these valve element 42 controls, make that fuel can be from the area of low pressure current drainage to unloading area.Figure 4 illustrates the valve element 42 that is arranged in this open position.
If this opening 43 is covered by valve element 42, be that area of low pressure and unloading area disconnect, then this valve element 42 still can be carried out the stroke of an other open end towards vertical hole 41, compensates pressure and volume fluctuations in the area of low pressure thus at least in part.The possible stroke of the stroke ratio valve element 42 that supporting member 50 and valve spring 48 are performed is littler.This causes the load of valve spring 48 littler, and this valve spring can correspondingly be determined size more weakly.The range of this supporting member 50 and valve element 42 and therefore the rebound stroke of this valve spring 48 limit in the following manner: supporting member 50 clings on the inserting member 54.At this, this valve spring 48 preferably still is not compressed into piece.
Guarantee that by described at least one opening in the bottom 52 of supporting member 50 58 these valve elements 42 can be easily unclamp or cling to again on this supporting member from supporting member 50.Guarantee the pressure balance between two sides of supporting member 50 by described at least one opening 60 in the supporting member 50, made this supporting member in being full of vertical hole 46 of fuel, to move.By supporting member 50 according to this opening 62 of Stroke Control, realized the buffering of opening stroke motion in addition to valve element 42 and supporting member 50, reduced the load of valve spring 48 thus, be cushioned by the fuel pressure of in vertical hole 46, setting up because this opens stroke motion.
Figure 5 illustrates fuel relief valve 36, wherein open and control this fuel relief valve two-stage type two connections of this low pressure area according to second embodiment.Valve chest 38, supporting member 50, valve spring 48, inserting member 54 and sieves 44 and fixed element 45 thereof are constructed in the same manner at this and in first embodiment.Have only the valve element 142 and first embodiment differently to construct, however the outside dimensions of this valve element 142, i.e. diameter and length, identical with in first embodiment.Different with first embodiment, this valve element 142 is configured to hollow and has one deviate from the blind hole 176 of the end of valve spring 48 from it, wherein, this valve element 142 abut in that bottom 178 on the supporting member 50 is configured to seal.Near the closed end of this valve element 142, this valve element is provided with at least one opening 180, the opening of well format for example, and blind hole 176 is connected with the overcoat of valve element 142 by described opening.At this, this opening 180 is preferably configured as the throttle orifice of the cross section with definition.The inside of this blind hole 176 is present in the pressure-loaded in the area of low pressure enduringly.
If this valve element 142 is in its closed position by the effect of valve spring 48, then opening 43 is covered by this valve element, and the fluidic junction of opening 180 is positioned at 41 inner and these the vertical hole coverings of quilt of vertical hole.Therefore, this area of low pressure and unloading area disconnect.If the pressure in the area of low pressure is enough to make valve element 142 to overcome the power motion of spring 48, then at first under the little situation of opening stroke of valve element 142 this opening 180 leave vertical hole 41, make the area of low pressure pass through that described at least one opening 60 in blind hole 176, opening 180 and the supporting member 50 is connected with opening 62 and fuel can be discharged by this opening 62 from the area of low pressure.Under the little situation of opening stroke of this valve element 142, opening 43 is still covered by this valve element and keeps sealing, and making does not have fuel to discharge from the area of low pressure via opening 43.Opening in the stroke of the continuation of this valve element 142, this valve element is release opening 43 also, makes fuel also can be discharged to the reflow pipe 11 from the area of low pressure via opening 43.
The two-stage type of fuel relief valve 36 structure to be applied in a kind of like this fuel injection system be favourable, only part in the fuel quantity of being carried by transfer pump 10 in this fuel injection system is transported in the inner space 19 of high-pressure service pump 14, is used for the lubricated and cooling of the drive unit of this high-pressure service pump.If be present in the underpressure in the area of low pressure so that fuel relief valve 36 is opened, then all fuel quantities of being carried by transfer pump 10 flow to high pressure fuel pump 14 by fuel metering device 16 and are used for carrying.If the pressure that is present in the area of low pressure reaches one first limiting value, then this fuel relief valve 36 is opened in the first order, and the fuel quantity of discharging via described at least one opening 60 opening 180, the supporting member 50 and opening 62 from blind hole 176 when this first order is opened is transported to inner space 19 according to Fig. 1 by pipeline 13.Therefore, at first guaranteed when engine starting by high-pressure service pump 14 transfer the fuel and then guarantee enough lubricated and coolings apace the drive area of high-pressure service pump 14.If the pressure that is present in the area of low pressure reaches second a higher limiting value, then the second level also is opened in fuel relief valve 36, and its mode is that valve element 142 release openings 43 and fuel can be discharged to the fuel storage container 12 via reflow pipe 11 from the area of low pressure.
Claims (10)
1. the fuel relief valve that is used for fuel injection system, in particular for the pressure in the area of low pressure of limiting described fuel injection system, described fuel relief valve has a valve chest (38), but a to-and-fro motion be arranged on valve element (42 in the described valve chest (38); 142), lead to be connected (43) of inlet with the unloading area of described valve chest (38) by the to-and-fro motion control of described valve element by described valve element, wherein, described valve element (42; 142) be loaded on the direction of closed position by a valve spring (48), interrupt in inlet described in this closed position and described connection the (43) between the described unloading area, and described valve element is loaded opening on the direction by the pressure that is present in the described inlet, it is characterized in that described valve element (42; 142) can on closing direction, surpass its closed position and carry out an other stroke, not act on described valve element (42 at valve spring (48) described in the described other stroke; 142) on.
2. according to the fuel relief valve of claim 1, it is characterized in that described valve spring (48) acts on described valve element (42 by a supporting member (50); 142) on, described supporting member not with described valve element (42; 142) connect, described supporting member (50) on closing direction at described valve element (42; Abut in the zone of closed position 142) on the backstop (56) in the described valve chest (38).
3. according to the fuel relief valve of claim 2, it is characterized in that, described supporting member (50) can lead movably in described valve chest (38) and define a space (46) in described valve chest (38), described valve spring (48) is arranged in the described space, described space (46) has the connection (62) of leading to unloading area, and described connection (62) is controlled according to the stroke of described supporting member by described supporting member (50).
4. according to the fuel relief valve of claim 3, it is characterized in that, the described connection (62) of described space (46) and described unloading area abuts at described supporting member (50) and opens when described backstop (56) goes up, and described supporting member (50) towards described valve element (42; Close by described supporting member (50) in the motion of the direction of open position 142).
5. according to the fuel relief valve of one of claim 2 to 4, it is characterized in that, described supporting member (50) is configured to jar shape, described valve spring (48) extend in the described supporting member (50) and abuts on the bottom (52) of described supporting member, and described supporting member (50) abuts in described valve element (42 with its described bottom (52); 142) on.
6. according to the fuel relief valve of claim 5, it is characterized in that, described supporting member (50) has first opening (58) that at least one has big cross section in a zone of its described bottom (52), abut in described valve element (42 at supporting member described in the described zone; 142) on, and described supporting member (50) does not abut in described valve element (42 its one of described bottom (52); 142) has second opening (60) that at least one has little cross section in the zone on.
7. according to the fuel relief valve of one of above claim, it is characterized in that, control described inlet in addition by described valve element (142) and be connected (180) with the throttling of outlet (62), wherein, in described valve element (142) is being opened stroke on the direction, under the little situation of opening stroke, at first open described inlet by described valve element and be connected (180), and under the bigger situation of opening stroke, open described connection the (43) of described inlet and described unloading area with the described throttling of described outlet (62).
8. according to the fuel relief valve of claim 7, it is characterized in that, described valve element (142) is configured to piston shape, in vertical hole (41) of described valve chest (38), lead hermetically and have an open ended blind hole (176) towards described valve spring of deviating from of described valve element (48), described blind hole is connected with described inlet enduringly, the described connection (43) of leading to described unloading area is drawn out to described valve element (142) from described vertical hole (41) outer putting and the open end control of described connection (43) by described valve element (142), described throttling connect comprise at least one described valve element (142) towards draw from described blind hole (176) near the bottom (178) of the sealing of described valve spring (48) and lead to described valve element (142) described outside the opening (180) that puts, cover described opening (180) by described vertical hole (41) and control and being connected of described outlet (62).
9. the fuel injection system that is used for internal-combustion engine, described fuel injection system has a high-pressure service pump (14), by described high-pressure service pump the fuel under the high pressure is transported at least one sparger (120) at least indirectly, described fuel injection system also has a transfer pump (10), by described transfer pump to described high-pressure service pump (14) transfer the fuel, wherein, described high-pressure service pump (14) has at least one pump piston (26), described pump piston is by a drive unit (20 that is arranged in the drive area (19), 22) driving is reciprocating, between described transfer pump (10) and described high-pressure service pump (14), constitute an area of low pressure, the described drive area (19) of described high-pressure service pump (14) is connected with described area of low pressure, and in described area of low pressure, be provided with a fuel relief valve (36), it is characterized in that described fuel relief valve (36) is constructed according to one of above claim.
10. according to the fuel injection system of claim 9, it is characterized in that, between described transfer pump (10) and described high-pressure service pump (14), be provided with a fuel metering device (16), can regulate the fuel quantity of carrying by described high-pressure service pump (14) changeably by described fuel metering device, and described area of low pressure is extended between described transfer pump (10) and described fuel metering device (16).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710052665 DE102007052665A1 (en) | 2007-11-05 | 2007-11-05 | Fuel overflow valve for a fuel injector and fuel injector with fuel spill valve |
| DE102007052665.4 | 2007-11-05 | ||
| PCT/EP2008/062443 WO2009059833A1 (en) | 2007-11-05 | 2008-09-18 | Fuel overflow valve for a fuel injection system, and fuel injection system having a fuel overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101849096A true CN101849096A (en) | 2010-09-29 |
| CN101849096B CN101849096B (en) | 2013-06-19 |
Family
ID=40254379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880114809XA Expired - Fee Related CN101849096B (en) | 2007-11-05 | 2008-09-18 | Fuel overflow valve for a fuel injection system, and fuel injection system having a fuel overflow valve |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8973557B2 (en) |
| EP (1) | EP2207955B1 (en) |
| JP (1) | JP5222368B2 (en) |
| KR (1) | KR101481206B1 (en) |
| CN (1) | CN101849096B (en) |
| DE (1) | DE102007052665A1 (en) |
| WO (1) | WO2009059833A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322217A (en) * | 2012-03-22 | 2013-09-25 | 罗伯特·博世有限公司 | Proportional valve with improved sealing fit |
| CN103375452A (en) * | 2012-04-26 | 2013-10-30 | 哈米尔顿森德斯特兰德公司 | Servo minimum pressure valve assembly |
| CN104334864A (en) * | 2012-05-25 | 2015-02-04 | 卡特彼勒发动机有限及两合公司 | Wear resistant insert element for a baffle body and baffle body for a plunger operated fuel pump |
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- 2008-09-18 JP JP2010532523A patent/JP5222368B2/en not_active Expired - Fee Related
- 2008-09-18 CN CN200880114809XA patent/CN101849096B/en not_active Expired - Fee Related
- 2008-09-18 KR KR1020107009853A patent/KR101481206B1/en not_active IP Right Cessation
- 2008-09-18 US US12/741,494 patent/US8973557B2/en not_active Expired - Fee Related
- 2008-09-18 EP EP20080848181 patent/EP2207955B1/en not_active Not-in-force
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| CN111868370A (en) * | 2018-01-17 | 2020-10-30 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels |
| CN108386302A (en) * | 2018-05-07 | 2018-08-10 | 长沙燕通生物科技有限公司 | Diesel engine energy storage and shunting starter |
| CN110700969A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels and method for operating same |
| CN110700969B (en) * | 2018-07-10 | 2022-06-28 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels and method for operating same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2207955A1 (en) | 2010-07-21 |
| KR101481206B1 (en) | 2015-01-09 |
| WO2009059833A1 (en) | 2009-05-14 |
| US8973557B2 (en) | 2015-03-10 |
| DE102007052665A1 (en) | 2009-05-07 |
| EP2207955B1 (en) | 2014-11-12 |
| CN101849096B (en) | 2013-06-19 |
| JP2011503413A (en) | 2011-01-27 |
| KR20100072338A (en) | 2010-06-30 |
| JP5222368B2 (en) | 2013-06-26 |
| US20100258092A1 (en) | 2010-10-14 |
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